Hib-am d lliawa y



H. DLLAWAY.

GLASS MOLD. No. 2,226. Patented Aug. 2]., i841.

HRAM DILLAWAY, or BosToN, MASSACHUSETTS.

eoNsTRUoTIoN or Moins" rolt rrtnssiive Grass.-

specincaton formingl part of Letters Patent No. 2,2261, dated Agust ai, 18411;? :aeissuea ivi-ay 1,- 1855-, Ne. 308-.

To' all eeft-0m t may concern Ile it known that I, I-IIRAM DTLLAWAY' of the city of Boston, in the' county of Suffolk and Commonwealth of lifas'sachu'setts, 1na= chinist, have invented a new and useful Im"-A provement in thel Art of Pressing Solid articles of Glassware' in Melde, of which the following is* a fully and exact description;

My said invention consists in such aformation of the m'oldl, as shall cause the forms, by which I mean the cavities into whic'hj the articles are pressed orv molded',y to be filled with the melted glass, by means` of a pressur-e applied to a massl of that material in a larger fountain cennectedwith the forms and it may be applied either to pressing a single article or anum'ber of articles at one operation. Y

I will describe that mold which I have found convenient for pressing a number of small articles at once, but the relative' posi"-YV tions of the fountain and the forms may be raised according to circumstances in molding different articles. block, of a circular, o-r other convenient form, proportioned to the size of the article and number' of them to be formed at once, is made with a central elevation, or neck, on the top, in diameter equal to about half, and in height equal to about the whole, of that ofthe body of the block. The block is' divided' horizontally through the middle, so as to make anupper and lower section, which constitute the two parts of an open and shut mold. Through the center of this elevation o-r neck the upper section is bored vertically so as to have a cylindrical hollow of a diameter about half that of the neck passing entirely through it. The lower section is also bored vertically through the center, but so as to have a bore, of a diameter a little larger than that of the bore of the upper section. The lower edge of the bore of the upper section is then hollowed, or grooved, out, so as to make it meet, and match, that of the lower section when the two parts are put together. All that part of the cylindrical hollow thus made through the entire block, which is not occupied by the bottom piece hereinafter described, I call the fountain.

The forms of the articles to be ressed are made by cavities, on the inner sur aces of the upper and lower sections of the block, cut to the shape designed; those in the upper matching with those in the lower section, and .n

' amnew describing. may be found con:

venient` to have, in' that part of the forms' `next to the centralI bore, ans'mall el'ev'ati'on t with a sha'rpeiied edge, sufficient to forni' a slight indentation around the er the article pressed; y Theseronns may te as m1- merousas the# site of the article" to" be made', and of the block containing them, will ad: mit'.- To" the bore of the lower section, is fitted bottoni piece' reacl'iin'g as high asithe0 l lower edge of the forms, and'V entirely filling the bore to that point.

This bottom piece may be made permanent, or'niovable, as shall f be found most convenient in use. A plunger :is' fitted to the hollow', in th'e neck f the upper' sect-ion', so as' to pass down' the' bore yto the bottom piece. llfhen the plunger' is brought dowir entirely yhome' to the` bottom piece, the diameter of the boreA of the lower section, being larger than that of the bore of the upper, and consequently than that of the plunger which' is" fitted toit, and the' lower edge of'this upper bore' being hollwedL i out' to meet the' upper edge o f the" lower' one as abeve" described, there is left, around the .bottoni of the plunger, a vacant chamber into which all the forms open, so that the plunger, -however far pressed down, cannot close or obstruct the mouths of the forms.

It may be found convenient to have as in the mold I am now describing, on the inner surface of the upper section, at convenient points near its circumference, elongated square elevations, and on that of the lower one, corresponding depressions, matching the one into the other, for the purpose of keeping each part of .the mold secure in its proper place.

The block may be made of cast iron, or other metal suHiciently rm for the purpose, and capable of bearing heat, and the central hollow and plunger may be made square, instead of cylindrical, when a number of articles are to be made at once, of such a shape as to make that form most convenient.

For the better specification of my said improvement, I refer to the accompanying drawings as follows:

Figure l, is the block showing the horizontal division C, D; one of the matched elevations and depressions E, F, and the top of the plunger E, dropped entirely down, to reach the bottom piece. Fig. 2, is a vertical section of the block A, B, showing the plunger e, and movable bottom piece f, and a sectional division of the forms g, and of the hollowing out of the lower edge of the bore, in the upper section, to meet the larger diameter of the bore in the lower section, .71.. Figs. 3 and 4, are horizontal sections of the mold on C, D, showing plan of the formsg, in the inner surfaces of the upper and lower sections of the mold, also the elevator z', and depression 7c. Fig. 5, is a movable bottom piece. Fig. 6, is a plunger. Fig. 7, is a top view of the mold without the plunger showing the aperture Z, into which the plunger passes. FigzB, is an underside view of the mold without the movable bottom piece showing the aperture into which it is placed.

The mode of using my said mold is described as follows: The mold being properly heated, a quant-ity of metal sufficient to fill all the forms, and a portion of the central hollow besides, is gathered and dropped in, at the neck of the upper section. lthe plunger is then brought down upon it, with a pressure sufficient to force the metal out laterally, from the central hollow, into all the forms communicating with it. Should the quantity gathered and dropped in at any time, be so little more than enough to fill the forms, as to allow the plunger to be forced down below their upper edges, the metal, not required to lill the forms, remaining in and filling the chamber, above described, will be suiiicient to prevent any imperfection in the pressing. After the metal is partially cooled,

the upper section is removed, and t-he pressed glass taken from the lower one, and the articles broken from the central mass, at the indentation made by the edged elevation before referred to. The object of making the bottom piece movable is, that if the glass hangs, or adheres, to the lower section, the bottom piece may be removed, and force a pressure applied from below, through the bore, to the central mass sufficient to start it with the articles attached, but this is rarely, if ever, found necessary.

Any number of articles, according to their size, and that of the block containing the forms, may be pressed at one time, from one central fountain, and by one plunger. The size, weight and thickness of the articles made at each successive use of the same mold, will be the same. The difference between the quantity of metal supplied at one time, and another, being left in the central mass, instead of being forced into the article formed.

`What I claim as my invention and desire to secure by Letters Patent, is-

lThe formation of the mold for pressing glass in such a manner, that the hollow form, or forms, into which the articles to be manufactured are pressed, shall communicate with a larger fountain filled with melted glass, so that the forms may be filled by pressure applied to the mass of melted glass in the fountain.

Intestimony whereof l the said HIRAM DILLAWAY, hereto subscribe my name in the presence of the witnesses whose names are hereto subscribed, on the sixth day of August A. D. 184:1.

HIRAM DILLAl/VAY.

W'itnesses MANLIUS S. CLARKE, GEO. W. PHILLIPS.

[FIRST PRINTED 1913.] 

